Oxygen scavengers with reduced oxidation products for use in...

C - Chemistry – Metallurgy – 08 – K

Patent

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C08K 5/09 (2006.01) C08F 8/00 (2006.01) C08K 5/00 (2006.01)

Patent

CA 2325404

An oxygen scavenger composition, for use in or with plastics materials, includes a polymer or oligomer having at least one cyclohexene group or functionality. The composition produces only low levels of volatile or (extractable from a plastics material in which it is incorporated) products as a consequence of oxygen scavenging. A family of polymers containing selected cyclic allylic pendent groups for oxygen scavenging packaging which has minimal organoleptic by-products after oxidation. Multilayer plastic containers for food and beverage packaging which incorporate oxygen scavenging resins which selectively oxidize upon activation without giving off odorous fragments.

La présente invention concerne une composition désoxygénante destinée à des matériaux plastiques et comprenant un polymère ou un oligomère portant au moins un groupe ou une fonction cyclohexène. La désoxygénation n'amène la composition à dégager que de faibles quantités de produits volatiles ou de produits pouvant se dégager de la matière plastique dans laquelle elle a été incorporée. L'invention concerne également une famille de polymères contenant des groupes allyliques cycliques pendants sélectionnés destinés à un emballage désoxygénant dégageant un minimum de sous-produits organoleptiques après oxydation. L'invention concerne enfin des récipients alimentaires et des emballages pour boissons fait de plastique multicouche et qui incorporent des résines désoxygénantes qui s'oxydent sélectivement à l'activation sans dégager de fragments odorants.

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